If you think you can do it, you can.
If you're going through hell, keep going.
Know or listen to those who know.
It's always too early to quit.
I can, therefore I am.
Quality is not an act, it is a habit.
Be gentle to all and stern with yourself.
By failing to prepare, you are preparing to fail.
If you've got a talent, protect it.
Either you run the day or the day runs you.
Without feeling abashed by my ignorance, I confess that I am absolutely unable to say. In the absence of an appearance of learning, my answer has at least one merit, that of perfect sincerity.